Úloha ID 1764 - 
Jsou dány dvě operace: X ♥ Y = 1/(X · Y), X @ Y = (X – Y)/(X · Y). Urči, jaký výsledek nám dá operace 2 ♥ (5 @ 3).
Správná odpověď je: E
5 @ 3 = 2/15; 2 ♥ (2/15) = 15/4.
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